Hyperplasia of the juxtaglomerula apparatus (epithelioid modified cells of the afferent arteriole, and Goormaghtigh cells) was observed at the early stages of existence of the human allografted kidney in the recipient's organism. These changes were accompanied by an increase of the juxtaglomerular index. In conjunction with the data of kariometric investigation these facts indicated an activation of juxtaglomerual apparatus of the human allografted kidney in the course of the first month after the transplantation.
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